1、Performance Requirements for Air Valve and Vent Inflow Preventer American Society of Sanitary EngineeringASSE Standard #1063-2008ASSE Board Approved: February 20, 2008ANSI Approved: October, 2009An American National StandardAir Valve and Vent Inflow Preventer IASSE Standard #1063 - 2008American Soci
2、ety of Sanitary EngineeringWestlake, OhioCopyright 2008Neither this standard, nor any portion thereof, may be reproduced without the written consent of the American Society of Sanitary Engineering.No product may be said to be ASSE approved unless the manufacturer has applied to the ASSE, has had the
3、 product tested by an official ASSE recognized independent laboratory, according to the applicable ASSE Standard, passed the test, and has been reviewed and approved by the consensus ASSE Seal Control Board. Having completed the aforementioned, the manufacturer may then display the ASSE Seal on the
4、product.Instructions for receiving the authorization to display the Seal are available from the ASSE International Office. Organizations wishing to adopt or list any ASSE Standard should print the ASSE Standard Number on the cover page first and in equal or larger type to that of the adopting or lis
5、ting organization.General InformationII Air Valve and Vent Inflow PreventerASSE Standard #1063 - 2008Air Valve and Vent Inflow Preventer IIIASSE Standard #1063 - 2008This foreword shall not be considered a part of the standard, however, it is offered to provide background information.ASSE Standards
6、are developed in the interest of consumer safety.Water distribution systems are equipped with air valves and air vents at multiple locations to release and admit air into pipelines and reservoirs to allow filling and draining, control surges, and maintain flow efficiency. If the valve or reservoir o
7、utlets become flooded or are the target of malicious tampering, the air entry point may be compromised and allow the entry of floodwater or the intentional introduction of a contaminate to the water system. The Air Valve and Vent Inflow Preventer is directly connected to air valve outlets and reserv
8、oir vent pipes. This device is normally open to allow unrestricted airflow in and out of pipelines and reservoirs during normal conditions. When a flood occurs, a float-operated closure member automatically closes to prevent the entry of contaminated fluids. A redundant, float-operated closure membe
9、r automatically closes if the first one fails. The device is mounted in or near air valve vaults or reservoir vents. Recognition is made of the time volunteered by members of the working group and of the support of the manufacturers who also participated in the meetings for this standard.This standa
10、rd does not imply ASSEs endorsement of a product which conforms to these requirements.Compliance with this standard does not imply acceptance by any code body.This standard was promulgated in accordance with procedures developed by the American National Standards Institute (ANSI).ForewordIV Air Valv
11、e and Vent Inflow PreventerASSE Standard #1063 - 2008Edward LyczkoProduct Standards Committee ChairmanCleveland ClinicCleveland, OhioRand H. AckroydRand EngineeringNewburyport, MassachusettsMichael BeckwithState of Wisconsin Department of CommerceMadison, WisconsinGunnar O. CollinsCollins Backflow S
12、pecialists, Inc.Palatine, IllinoisJudson W. CollinsJULYCO ProfessionalsMannford, OklahomaShannon M. Corcoran ASSE Standards CoordinatorWestlake, OhioA. Richard EmmersonGeneral InterestBuffalo Grove, IllinoisCharles GrossInternational Association of Plumbingand Mechanical OfficialsWalnut, CaliforniaS
13、teven HazzardASSE Staff EngineerWestlake, Ohio2008-2009 Product Standards Committee John F. Higdon, P.E.Apollo Valves/Conbraco Industries, Inc.Pageland, South CarolinaValentine Lehr, P.E.Lehr AssociatesNew York, New YorkChuck LottPrecision Plumbing Products, Inc.Portland, OregonPeter MarzecUnited As
14、sociation ofPlumbers and PipefittersWashington, D.C.Brad NollWilkins, A Division of Zurn Industries, Inc.Paso Robles, CaliforniaThomas C. Pitcherello State of New JerseyBordentown, New JerseyShabbir RawalpindiwalaKohler CompanyKohler, WisconsinTsan-Liang Su, Ph.D.Center for Environmental SystemsStev
15、ens Institute of TechnologyHoboken, New JerseyJoseph C. Zaffuto, P.E.ASSE Staff EngineerWestlake, OhioAir Valve and Vent Inflow Preventer VASSE Standard #1063 - 2008Ahtu AsoKMK Consultants LimitedBrampton, Ontario, CanadaJohn BallumValmatic CorporationElmhurst, IllinoisSteven HazzardASSE Staff Engin
16、eerWestlake, OhioKenneth J. KerrKerr MarketingBrunswick, Ohio Phillip LandonValmatic CorporationElmhurst, Illinois1063 Working GroupVI Air Valve and Vent Inflow PreventerASSE Standard #1063 - 2008Table of ContentsSection I 11.0 General . 11.1 Application 11.2 Scope . 11.3 Limitations on Design . 1Ta
17、ble 1 2Table 2 2Table 3 31.4 Reference Standards 3Section II . 42.0 Test Specimens 42.1 Samples Submitted 42.2 Samples Tested 42.3 Drawings . 42.4 Rejection . 4Section III 53.0 Performance Requirements and Compliance Testing 53.1 Hydrostatic Testing of Complete Device . 5Figure 1 53.2 Water Tightnes
18、s Test of Float-Operated Checks 5Figure 2 63.3 Allowable Pressure Loss at Rated Air Flow 6Figure 3 73.4 Vacuum Flow Test . 7Figure 4 8Section IV . 94.0 Detailed Requirements . 94.1 Materials . 94.2 Documentation . 94.3 Markings . 10Section V 115.0 Definitions . 11Appendix A . 12A1.0 Recommended Inst
19、allation Guidelines 12A1.1 General 12A1.2 Orientation . 12A1.3 Clearances 12Air Valve and Vent Inflow Preventer 1ASSE Standard #1063 - 2008Air Valve and Vent Inflow PreventerSection I1.0 General 1.1 ApplicationThe purpose of Air Valve and Vent Inflow Preventer Assemblies (herein after referred to as
20、 the “assembly”) is to allow the release and admission of high volumes of air through air valves and air vents in water distribution systems but prevent the entry of contaminated water when the air valve outlet becomes submerged from flooding or is the target of malicious tampering.1.2 Scope1.2.1 De
21、scriptionThis assembly shall consist of a primary and a secondary chamber. Each chamber shall contain an independent float-operated closure member. The primary chamber is the lower chamber. The secondary or upper chamber is redundant and will close in the event the primary chamber fails to close. Ot
22、her configurations achieving the perfor-mance requirements of this standard are acceptable.1.2.2 Size Range and ConnectionsSizes 1 to 4 NPS (25 to 100 mm) shall be furnished with an NPTF threaded connection. Sizes 6 to 16 NPS (150 to 400 mm) shall be furnished with a flanged connection.1.2.3 Pressur
23、e RangeThe assembly shall be designed and constructed for an operating pressure range of 9.7 psia (66.9 kPaabsolute) to 25.0 psi (172.4 kPa).1.2.4 Temperature RangeThe assembly shall function at temperatures from 32.0 F to 150.0 F (0 C to 65.6 C).1.3 Limitations on Design1.3.1 Flow Design Flow ways
24、through the entire assembly passage-way shall be as follows:a) The least cross-sectional area of the air flow ways, including the seat areas, shall not be less than the inside cross-sectional area of the same NPS.b) The manufacturer shall furnish a sectional print of the assembly with all of the dim
25、ensions needed to enable a verification of the passage-way areas.c) The assembly shall, at a minimum, pass the required volume of air according to Table 1.2 Air Valve and Vent Inflow PreventerASSE Standard #1063 - 2008Table 11.3.2 FunctionThe assembly shall be normally open to allow sustained ventin
26、g of air at the rate given in Table 1 and remain open when the flow is reversed at the same rate. During the flowing conditions, the differential pressure between the inlet piping and atmosphere shall not exceed that given in Table 1.1.3.3 Outlet BasketThe assembly shall be shielded from incoming de
27、bris with a screened basket containing 1/4 inch ( 6 mm) diameter openings to prevent plugging and sealing of the device outlet and exhibiting an open flow area equal to at least four (4) times the cross sectional area of the same NPS.1.3.4 LeakageThe assembly shall not permit water leakage past both
28、 chambers when pressurized to 12.0 inches (304.8 mm) water column above the seats.1.3.5 Connections1.3.5.1 Female Pipe Threaded ConnectionsFemale pipe threaded connections shall conform to the requirements of ASME B1.20.1, and be tapped into a hex-agonal boss capable of withstanding without deformat
29、ion or breakage the torque given in Table 2.Table 2Size of Assembly Rated Flow Maximum Pressure Loss at Rated FlowNPS12346810121416 DN255075100150200250300350400SCFM17469715702790627011,10017,40025,10034,11144,600L/s82329741131729595239821211,84616,09921,049p.s.i.5.05.05.05.05.05.05.05.05.05.0kPa34.
30、534.534.534.534.534.534.534.534.534.5Size TorqueNPS1234DN255075100lbf.inch60090012002400Nm68102136271Air Valve and Vent Inflow Preventer 3ASSE Standard #1063 - 20081.3.5.2 FlangesFlanges shall be flat-faced and drilled to mate with ASME B16.1 for Class 125 cast iron flanges, ASME B16.42 for Class 15
31、0 ductile iron flanges, and ASME B16.5 for Class 150 steel flanges. The flange shall be of sufficient thick-ness to withstand the rated pressure. 1.3.6 RepairabilityThe internal parts of the assembly shall be accessible for testing, inspection, repairs or replacements. The design shall permit servic
32、ing and field testing without removing the assembly from the water distribution system. 1.3.7 Test Cock LocationsTest cocks shall be provided in the following locations:(a) On the top surface of the assembly adjacent to the inlet connection.(b) In the top chamber below the top check seat.(c) In the
33、lower chamber below the lower check seat. 1.3.8 Test Cock SizeThe minimum inlet and outlet NPT thread size of test cocks shall be in accordance with Table 3.Table 31.4 Reference StandardsReferences to industry standards shall mean the latest edition. ASME B1.20.1-1983 Pipe Threads, General Purpose,
34、Inch ASME B.16.1M-1984 Gages and Gaging for Metric M Screw Threads ASME B.16.42-1998 Ductile Iron Pipe Flanges and Flanged Fittings: Classes 150 and 300 ASME B16.5-1996 Pipe Flanges and Flanged Fittings ANSI/NSF 61-2007 Drinking Water System Components - Health EffectsSize of Assembly Minimum Size o
35、f Test CockNPS1 to 46 & LargerDN25 to 100150 & LargerInch1/2 NPT3/4 NPT4 Air Valve and Vent Inflow PreventerASSE Standard #1063 - 2008Section II1.0 Test Specimens2.1 Samples SubmittedThree (3) assemblies of each model and size from 1 NPS through 4 NPS (25 DN through 100 DN) and one (1) assembly for
36、sizes 6 NPS (150 DN) and larger shall be submitted by themanufacturer. 2.2 Samples TestedThe testing agency shall select one (1) assembly of each model and size for the full test. Tests shall be performed in the order listed on one (1) assembly of each model and size submitted.2.3 DrawingsAssembly a
37、nd installation drawings and other data which are needed to enable a testing agency to determine compliance with this standard shall accompany assemblies when submitted for examination and performance tests under this standard.2.4 RejectionFailure of one (1) device shall be cause for rejection of th
38、at type or model and size. Failure of one (1) assembly shall result in a rejection of that model and size.Air Valve and Vent Inflow Preventer 5ASSE Standard #1063 - 2008Section III3.0 Performance Requirements and Compliance Testing3.1 Hydrostatic Testing of Complete Device3.1.1 PurposeThe purpose of
39、 this test is to demonstrate the assemblys ability to withstand a pressure of 50.0 psi ( 344.7 kPa) or two (2) times the manufacturers maximum rated working pressure, whichever is greater.3.1.2 ProcedureSecure the assembly in the inverted orientation (to hold the floats off of the seats) and block t
40、he outlet with an ex-pandable plug or blind flange as shown in Figure 1. Connect a water supply at ambient temperature to the inlet of the assembly, and fill the assembly completely by bleeding air out of the top test cock. Apply a pressure of 50.0 psi ( 344.7 kPa) or two (2) times the manufacturers
41、 maximum rated working pressure, whichever is greater, for ten (10) minutes. Examine the assembly for leaks.Figure 13.1.3 CriteriaAny leaks through the body or the body flanges or indications of damage shall result in a rejection of the assembly.3.2 Water Tightness Test of Float-Operated Checks3.2.1
42、 PurposeThe purpose of this test is to demonstrate the float checks ability to provide a water tight seal at low pressures.6 Air Valve and Vent Inflow PreventerASSE Standard #1063 - 20083.2.2 ProcedureConnect the test apparatus with a 1.0 inch (25.4 mm) diameter riser tube as shown in Figure 2. Bloc
43、k the outlet (bottom) with an expandable plug or blind flange. Open test cocks #1 and #2. Open the supply valve to fill the float check assembly and riser tube to 12.0 inches (304.8 mm) above the seat. Close the supply valve, and allow the water to stabilize in the riser tube for one (1) minute. Mar
44、k the water height on the tube, and observe the water level for five (5) minutes. Repeat the test with the supply connected to test cock #2.Figure 23.2.3 CriteriaA drop in water column height greater than 1/8 inch (3.2 mm) for either seat test shall result in a rejection of the assembly.3.3 Allowabl
45、e Pressure Loss at Rated Air Flow3.3.1 PurposeThe purpose of this test is to verify the pressure drop through the assembly at the air flow capacity given in Table 1 of this standard. 3.3.2 ProcedureInstall the assembly as shown in Figure 3. Connect a schedule 40 steel air supply line equal to the as
46、sembly size. The test setup shall have an airflow measuring device to measure the flow rate in the piping and a pressure trans-ducer for measuring the pressure change in the piping system. The air flow measuring device shall be capable of measuring the air flow up to the capacity range given in Tabl
47、e 1 for the sizes to be tested with a 5% accuracy. The pressure transducer shall be 10.0 psi ( 68.9 kPa) full scale with a 5% full scale accuracy. The fan or suitable air source shall be capable of delivering the air flow within the capacity range given in Table 1.Activate the fan or pressure source
48、 until the flow rate specified in Table 1 is achieved. Record the value of the pres-sure corresponding to the specified flow rate.NOTE: Leakage through the test connection or temporary plug during the test is acceptable.1” I.D.Air Valve and Vent Inflow Preventer 7ASSE Standard #1063 - 2008Figure 3Re
49、move the assembly and repeat the test through the test piping at the specified flow rate. Record the value of the pressure loss. Subtract the test piping pressure loss from the assembly pressure loss, and record the net pressure loss.3.3.3 CriteriaPressure losses greater than those specified in Table 1 shall result in a rejection of the assembly.3.4 Vacuum Flow Test3.4.1 PurposeThe purpose of this test is to determine the functionality of the assembly during vacuum flow conditions.3.4.2 ProcedureInstall the assembly in a test pipe of sufficient diameter to
